人工无性系四倍体桑品种陕桑402的选育  

Breeding of a Mulberry Clone Tetraploid Variety,Shansang 402

作　　者：苏超[1] 朱光义[1] 陈旗[1] 王淑侠[1] 韩明斋[1] 

机构地区：[1]西北农林科技大学蚕桑丝绸研究所陕西省蚕桑丝绸研究所,周至710400

出　　处：《蚕业科学》2006年第1期95-98,共4页ACTA SERICOLOGICA SINICA

基　　金：国家十五科技攻关项目子专题(编号2001BA502B01-06);陕西省科技攻关项目(编号2003K02-G7);西北农林科技大学科研专项(编号05YZ041)

摘　　要：采用0．1％-0．4％的秋水仙碱处理二倍体桑品种新一之濑（2n=2x=28）当年嫁接苗的茎尖，诱导出8个突变株，将这些突变株按株系进行单芽分离嫁接，发现编号为402—3的株系在所分离出的四倍体（2n=4x=56）株系中性状突出，经系统选育培育成无性系四倍体品种陕桑402（2n=4x=56）。该品种发芽率高，生长旺盛，在北方蚕业科研协作区域试验的桑叶产量较湖桑32号（2n=2x=28）提高26．9％，万头茧层量增加5．4％，抗逆性强，是一个综舍性状优起、丰产性能突出的人工无性系四倍体桑品种。Eight mutant plants were induced by treating the stem-point of diploid cultivar sinichinose（2n =2x = 28）with 0. 1%-0.4% colchicines. A tetraploid plant 402-3 had been obtained by clonal separation in mutant plants. And a mulberry artificial clone tetraploid variety,Shansang 402 （2n =4x =56）, had been bred by pedigree breeding method. Shansang 402（2n =4x =56） presents a higher occurrence rate and a vigorous growth. The regional test results showed that comparing with the control, Husang 32, the leaf yield increased by 26.9% and the cocoon shell amount per 10 000 silkworms increased by 5.4%. The above results showed that Shansang 402 is a fine variety with outstanding high-yielding ability and adverse resistance.

关 键 词：桑树品种 四倍体 无性系 陕桑402 诱变 

分 类 号：S888.31[农业科学—特种经济动物饲养]